Concentric Butterfly Valve

Lug Type Concentric Butterfly Valve

Product Description

The XDV Concentric Butterfly Valves is designed to maintain a seal against bi-directional pressure differential to prevent backflow in systems designed for unidirectional flow. it accomplishes this with a tightly fitting seal, i.e. gasket, O-ring, precision machined, and a flat valve face on the upstream and downstream sides of the valve, valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side.

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Product Range&Features

Size	2"~36"
Rating	150LB
Body Materials	Cast Iron, Carbon Steel, Stainless Steel, XDSS, etc.
Trim	Per API 609
Design Standards	API 6D, ASME B16.34
Face to Face Standards	ASME B16.10
Flange Dimension Standards	ASME B 16.5
Pressure Test Standards	API6D, API 598
Quality/Product Certifications	ISO9001, ISO14001, ISO18001
Fugitive Emissions	ISO 15848-1, API 622
NACE	NACE MR 0103 NACE MR 0175
Shutoff Class	API 6D
End Connection	RF, RTJ, Wafer, Lug
Operation	Lever, Gear, Motor, Pneumatic

Product Details

NO.	PAPT NAME	MATERIAL-ASTM
1	BODY	DI
2	SEALING SEAT	F46
3	STEM	STAINLESS STEEL
4	DISC	DI/CF8 F46
5	PIN	45
6	BUSHING	POLYMER MATERIALS PTFE
7	SEAL RINGS	EPDM
8	GEARING	COMBINATION

Valve installation instruction

The valve should be installed in the location being sure to provide convenient operation, maintenance and replacement.
As mounting the butterfly valve, fail to consider flow direction of mediums in pipeline, that is to say, the valve can be used in double way.
Before installation, the butterfly valve should be stored in ware house and prevent it from moisture and in s0 doing, the disc should be kept to open at an angle of 15 degrees.
Before installation, the following processes should be completed:

(1) Check carefully and conform the operation condition of the valve is in line with the technical specification and requirements.

(2) Clean the disc sealing area and body sealing completely. It is not permitted to open the disc before cleaning.

(3) Check and confirm the handle is strongly collected to the flange and stem.

As mounting the butterfly valve in pipeline, the load for tightening connection bolts should be uniformed.
After installation, the disc must be opened in the case of the strength pressure test on pipeline being carried out.
After being installed, the valve should be examined regularly. The main item to be checked are as follows:

(1) Whether the valve seat and 'O' sealing ring have been damaged.

(2) Check the sealing effects of the disc sealing area.

(3) After the valve was examined and assembled, no scuffing happens at the time of on-off rotation.

(4) After the valve was examined and assembled, the sealing test should be carried out as the introduction.

(5) After each examination, detailed records should be filed for reference.

Troubleshooting guide

TROUBLE	CAUSE	SOLUTION
Leakage in sealing area	Disc sealing area or body sealing seat scratched, Disc is not closed completely. Hexagonal socket head bolts on clamping ring are not tightened completely.	Repair the disc sealing replace repair the body sealing seat, adjust actuator to close the disc completely, tighten loosed hexagonal socket head bolts.
Leakage in shaft end	The seat or The o ring is not pressed completely.	Replace the body sealing seat
Leakage in joint area between valve face and relevant flange on pipeline	Connection bolts are not screwed up uniformly.	Tighten the connection bolts evenly.